A271243 Number of nXnXn triangular 0..5 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different.

0, 0, 77, 38571, 43105569, 131856310191, 1093512241613007, 24635545692810106290, 1513334529452573133766363

Offset

1,3

Comments

Column 5 of A271246.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.2......1.1......0.1......1.2......1.1......1.2......1.1......1.0
...1.1.0....2.3.3....0.2.0....1.2.3....2.3.4....2.3.1....1.2.2....2.0.1
..1.0.2.2..1.4.1.4..2.0.2.0..3.1.0.1..2.2.0.1..2.2.3.2..0.3.4.0..0.0.3.1

Crossrefs

Cf. A271246.

Sequence in context: A266054 A267956 A267910 * A271244 A271245 A196543

Adjacent sequences: A271240 A271241 A271242 * A271244 A271245 A271246

Keyword

nonn

Author

R. H. Hardin, Apr 02 2016

Status

approved